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Btrfs: use async helpers for DIO write checksumming

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The async helper threads offload crc work onto all the
CPUs, and make streaming writes much faster.  This
changes the O_DIRECT write code to use them.  The only
small complication was that we need to pass in the
logical offset in the file for each bio, because we can't
find it in the bio's pages.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2010-05-25 09:48:28 -04:00
parent ed3b3d314c
commit eaf25d933e
5 changed files with 52 additions and 17 deletions
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2
fs/btrfs/extent_io.c
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@@ -1913,7 +1913,7 @@ static int submit_one_bio(int rw, struct bio *bio, int mirror_num,
if (tree->ops && tree->ops->submit_bio_hook)
tree->ops->submit_bio_hook(page->mapping->host, rw, bio,
mirror_num, bio_flags);
mirror_num, bio_flags, start);
else
submit_bio(rw, bio);
if (bio_flagged(bio, BIO_EOPNOTSUPP))